Thermos 764 Stopper Lid

My co-worker cracked her thermos lid/stopper and it was a gift from her father who's passed. I measured it with my calipers and first print worked great. The photos with the caliper and tape measure are not mine, just photos I found online but it appears to be the same one. I do not know what material is food grade for sure, I did a web search and supposedly PETG is food safe but please do your research if you plan on using this with hot or even cold liquids. My coworker just wanted a working lid as it's a sentimental item and she does not really use it.